Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Hormone improves long-term recovery from stroke

17.05.2011
Scientists at the Sahlgrenska Academy have discovered an explanation of how stroke patients can achieve better recovery. A hormone that is associated with the growth hormone system has proved to benefit recovery during the later phases of rehabilitation after a stroke.

Insulin-like growth factor I, IGF-I, is a hormone that is found in the blood and contributes to, among other things, growth and bone mass. The levels of this hormone are higher in people who exercise regularly and those with good health.

Scientists at the Sahlgrenska Academy have shown for the first time that high levels of this hormone are associated with better long-term recovery after a stroke. The study has been presented in an article in the Journal of Clinical Endocrinology and Metabolism.

“This study is interesting for two reasons. The first is that we show that a hormone is associated with improved long-term recovery, and thus there is still the prospect of improvement – even after three months after the stroke. The second is that levels of this hormone are known to be elevated in those who exercise often”, says Associate Professor David Åberg at the Sahlgrenska Academy, who has led the study in collaboration with Professor Jörgen Isgaard.

“It is, however, important to add that the levels of IGF-I are controlled also by other factors such as other growth hormones, heredity and nutrition”, emphasises David Åberg.

The study is based on 407 patients who are participating in the SAHLSIS study at the Sahlgrenska Academy, in which people aged 18-70 years who are affected by stroke are followed up for two years after the event. SAHLSIS is an acronym for “The Sahlgrenska Academy Study on Ischemic Stroke”.

Scientists have measured the levels of IFG-I in these 407 patients and seen that increased levels are associated with better recovery, when the degree of recovery is determined between 3 and 24 months after the stroke. Previous research (Bondanelli et al) has also shown a positive effect of high IGF-I levels in the early phase after a stroke, while the scientists at the Sahlgrenska Academy have now demonstrated that the positive effects on recovery remain long after the stroke event.

“Our results may explain why patients who exercise more actively, with physiotherapy and physical exercise, demonstrate better recovery after a stroke. Unfortunately, we do not know how much our patients exercised after the stroke. This means that we need to carry out further studies in which we measure both the amount of physical activity and the levels of IGF-I, in order to understand the exact relationships better”, David Åberg points out.

These results pave the way for further studies on whether drug treatments that raise IGF-I levels can improve long-term recovery after stroke. David Åberg believes that two avenues are open: either to treat with IGF-I, or to treat with the better known growth hormone (GH). This can stimulate the body’s own production of IGF-I.

“Of course, these possibilities must be tested in carefully constructed clinical trials, so that we discover any undesired effects that must be considered. This is particularly true during the acute phase of a stroke, while treatment during the recovery phase is probably easier and has greater benefit”, says David Åberg.

The journal: The Journal of Clinical Endocrinology and Metabolism
Title of the article: “Serum IGF-I Levels Correlate to Improvement of Functional Outcome after Ischemic Stroke”.
Authors: Daniel Åberg, Katarina Jood, Christian Blomstrand, Christina Jern,
Michael Nilsson, Jörgen Isgaard, and N. David Åberg
For more information, contact:
David Åberg, licensed doctor and associate professor at the Sahlgrenska Academy, tel. +46(0)31 3428 422, +46(0)73 6185 196, e-mail: david.aberg@medic.gu.se

Helena Aaberg | idw
Further information:
http://www.gu.se

More articles from Life Sciences:

nachricht Water forms 'spine of hydration' around DNA, group finds
26.05.2017 | Cornell University

nachricht How herpesviruses win the footrace against the immune system
26.05.2017 | Helmholtz-Zentrum für Infektionsforschung

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>